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Illustration of Advanced file input and output:
For illustration, to refer to the third number in the first element of the cell array:
>> subjdata{1}(3)
ans =
3.3000
The script which reads in this data and echo-prints it is shown here:
Executing this script generates the following results which are as shown below:
>> textscanex
5.3 a
2.2 b
3.3 a
4.4 a
1.1 b
File close successful
To conclude, we know four techniques of reading from a file. The function load will only work when the values in the file are all of similar type and there is similar number on every line in the file, so that they can be read into the matrix. If this is not the situation, lower level functions should be used. To use these, the file should be opened first and then closed whenever the reading has been done. The fscanf function will read into the matrix, converting the characters to their ASCII equivalents. The textscan function will rather read into a cell array which stores each column from the file into individual column vectors of the cell array. At last, the fgetl function can be used in a loop to read each line from the file as an individual string; the string manipulating functions should then be used to break the string into pieces and convert to numbers.
Plot Functions: Faraway, we have plotted to generate two-dimensional plots and bar to generate bar charts. We have seen how to clear the Figure Window by using clf, and how to
m=2/3 b=4/5
Blanks function: The blanks function will generate a string consisting of n blank characters-that are kind of hard to see here! Though, in a MATLAB if the mouse is moved to hi
bar and barh functions: For a matrix, the bar and barh functions will group altogether the values in each and every row. The illustration is as shown: rm = randint(2,4,[1
The variance is generally defined in terms of the arithmetic mean as: At times, though, the denominator is defined as n instead of n - 1. The default definition used by t
Error-Checking for Integers: As MATLAB uses the type double by default for all the values, to check to make confirm that the user has entered an integer, the program have to c
Writing and Reading Spreadsheet Files: The MATLAB functions xlswrite & xlsread will write to and read from the spreadsheet files which have the extension .xls. For illustratio
Concatenation: The String concatenation means to join the strings altogether. Of course, as strings are merely vectors of the characters, the technique of concatenating vector
Example of Minimum and Maximum Value For matrices, the functions min and max operate column wise by the default: >> mat = randint(2,4,[1 20]) mat = 9 10 1
Writing variables to a File: The save command is used to write variables to a file, or to append the variables to a MAT-file. By the default, save function writes to a MAT-fil
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